this was my problem too (and by "was" I mean up till this tank the same). I'm now at almost 400 miles with more than 3/4 of a tank full. I've never seen that before... My fuel float is submerged for the first 15 to 20 gallons with this tank, so it falls fast after 1/2 and at one mark past half it has 20 gallons. When I fill it again and calculate the mileage, I'll know whether or not I will continue to drive this way. The odd thing is that if I was driving like this last year, I would have been getting shot at.... . However, my heavy foot always offsets any gains that might come from that. I think the best way to optimize your fuel economy is to drive with a light foot, keep your tires inflated properly, and run with the wind.![]()